Description
GE Multilin UR9EV
I. Overview
GE Multilin UR9EV is an important member of the GE Multilin UR series of universal relays, specially designed for equipment protection and control in power systems. As a high-performance industrial-grade relay, it integrates advanced protection algorithms, precise measurement functions, and flexible communication capabilities. It can provide comprehensive and reliable protection, monitoring, and control for power equipment such as generators, transformers, and motors, playing a key role in power transmission, distribution, and industrial power applications. Relying on GE's profound technical accumulation in the field of power automation, UR9EV has a high level of reliability, adaptability, and intelligence, which can meet the stringent requirements of complex power systems for equipment protection.
GE Multilin UR9EV is an important member of the GE Multilin UR series of universal relays, specially designed for equipment protection and control in power systems. As a high-performance industrial-grade relay, it integrates advanced protection algorithms, precise measurement functions, and flexible communication capabilities. It can provide comprehensive and reliable protection, monitoring, and control for power equipment such as generators, transformers, and motors, playing a key role in power transmission, distribution, and industrial power applications. Relying on GE's profound technical accumulation in the field of power automation, UR9EV has a high level of reliability, adaptability, and intelligence, which can meet the stringent requirements of complex power systems for equipment protection.
II. Functional Features
Comprehensive Protection Functions: UR9EV is equipped with rich protection functions, which can provide precise protection against various fault risks that different power equipment may face. For example, for common power faults such as overcurrent, overvoltage, undervoltage, overfrequency, underfrequency, zero-sequence current, and differential protection, the built-in protection algorithms can quickly detect and respond, promptly issue trip commands or alarm signals to prevent the expansion of faults, and minimize equipment damage and power outage losses. Its protection logic can be flexibly configured according to specific application scenarios to meet the protection needs of different equipment.
Comprehensive Protection Functions: UR9EV is equipped with rich protection functions, which can provide precise protection against various fault risks that different power equipment may face. For example, for common power faults such as overcurrent, overvoltage, undervoltage, overfrequency, underfrequency, zero-sequence current, and differential protection, the built-in protection algorithms can quickly detect and respond, promptly issue trip commands or alarm signals to prevent the expansion of faults, and minimize equipment damage and power outage losses. Its protection logic can be flexibly configured according to specific application scenarios to meet the protection needs of different equipment.
Precise Measurement and Monitoring: It has high-precision measurement capabilities and can real-time monitor key electrical parameters in the power system, such as current, voltage, power (active power, reactive power), power factor, frequency, and energy consumption. The measured data can not only provide a basis for judgment for the protection function but also help operation and maintenance personnel grasp the equipment operating status and evaluate system performance through data recording and analysis functions, providing strong support for the optimal operation of the power system and maintenance decisions. At the same time, it supports the monitoring of non-electrical parameters such as equipment temperature and oil level (with corresponding sensors), achieving comprehensive control of equipment status.
Flexible Communication and Integration Capabilities: It supports a variety of industrial standard communication protocols, such as Modbus, DNP3.0, IEC 61850, etc., and can perform seamless data interaction with SCADA systems, HMI (Human-Machine Interface), PLC, and other intelligent devices. Through the communication interface, functions such as remote monitoring, parameter setting, fault diagnosis, and data upload can be realized, facilitating the construction of a centralized power monitoring system and improving the automated management level and operation and maintenance efficiency of the power system. In addition, its modular design makes integration with other equipment more convenient, and functions can be flexibly expanded according to system requirements.
Intelligent Operation and Diagnosis: It has built-in powerful self-inspection and diagnosis functions, which can real-time monitor the relay's own hardware status, software operation, and external connection circuits. When an abnormality is detected, such as power failure, communication interruption, sensor failure, etc., it will immediately issue alarm information and upload the fault details through indicator lights or communication interfaces, facilitating operation and maintenance personnel to quickly locate and handle problems. At the same time, it supports local and remote operations, and is equipped with an intuitive human-machine interface (such as LCD display and operation buttons), which is convenient for on-site personnel to configure parameters, query status, and perform operation control, with a simple and easy-to-understand operation process.
III. Technical Parameters
Electrical Parameters
Power Input: Usually supports a wide range of AC/DC power input, such as 110-240V AC/DC, adapting to the power supply conditions of different power systems, ensuring stable operation even when the power supply voltage fluctuates.
Rated Current: The rated current of the measurement and protection circuit is generally 5A or 1A (configurable through external CT), meeting the current monitoring needs of most power equipment.
Rated Voltage: The rated voltage of the voltage circuit is usually 100V (line voltage or phase voltage, determined according to the system wiring mode), adapting to the voltage signal transformed by PT in high-voltage systems.
Measurement Accuracy: The measurement accuracy of current and voltage can reach 0.2 class, and the measurement accuracy of power can reach 0.5 class, ensuring the accuracy and reliability of measurement data.
Electrical Parameters
Power Input: Usually supports a wide range of AC/DC power input, such as 110-240V AC/DC, adapting to the power supply conditions of different power systems, ensuring stable operation even when the power supply voltage fluctuates.
Rated Current: The rated current of the measurement and protection circuit is generally 5A or 1A (configurable through external CT), meeting the current monitoring needs of most power equipment.
Rated Voltage: The rated voltage of the voltage circuit is usually 100V (line voltage or phase voltage, determined according to the system wiring mode), adapting to the voltage signal transformed by PT in high-voltage systems.
Measurement Accuracy: The measurement accuracy of current and voltage can reach 0.2 class, and the measurement accuracy of power can reach 0.5 class, ensuring the accuracy and reliability of measurement data.
Physical Parameters
Dimensions: Adopting a compact modular design, the external dimensions are usually standard DIN rail mounting dimensions, for example, width × height × depth is approximately 145mm×177mm×120mm (specific dimensions are subject to the actual product), which is convenient for installation and layout in the control cabinet, saving installation space.
Weight: It is relatively light, generally around 1kg, facilitating transportation, installation, and maintenance operations.
Dimensions: Adopting a compact modular design, the external dimensions are usually standard DIN rail mounting dimensions, for example, width × height × depth is approximately 145mm×177mm×120mm (specific dimensions are subject to the actual product), which is convenient for installation and layout in the control cabinet, saving installation space.
Weight: It is relatively light, generally around 1kg, facilitating transportation, installation, and maintenance operations.
Environmental Parameters
Operating Temperature: The operating temperature range is usually -25℃ to +70℃, which can adapt to harsh industrial environments such as high and low temperatures, ensuring stable operation in cold regions or high-temperature machine rooms and other scenarios.
Storage Temperature: The storage temperature range is -40℃ to +85℃, which can withstand large temperature changes during equipment transportation and storage without affecting performance.
Humidity: It can work normally in an environment with a relative humidity of 5% - 95% (non-condensing), has good moisture resistance, and is suitable for humid industrial environments or outdoor distribution rooms and other scenarios.
Protection Level: The shell protection level is generally IP20, suitable for installation inside the control cabinet to prevent dust and foreign objects from entering and protect internal circuit components.
Operating Temperature: The operating temperature range is usually -25℃ to +70℃, which can adapt to harsh industrial environments such as high and low temperatures, ensuring stable operation in cold regions or high-temperature machine rooms and other scenarios.
Storage Temperature: The storage temperature range is -40℃ to +85℃, which can withstand large temperature changes during equipment transportation and storage without affecting performance.
Humidity: It can work normally in an environment with a relative humidity of 5% - 95% (non-condensing), has good moisture resistance, and is suitable for humid industrial environments or outdoor distribution rooms and other scenarios.
Protection Level: The shell protection level is generally IP20, suitable for installation inside the control cabinet to prevent dust and foreign objects from entering and protect internal circuit components.
IV. Application Fields
Power Generation Systems: In power stations such as thermal power, hydropower, and wind power, UR9EV can be used for the protection and control of generators. It real-time monitors parameters such as stator current, rotor current, terminal voltage, and frequency of the generator. When faults such as overload, short circuit, and loss of excitation occur, it quickly acts to remove the fault to protect the generator's safety. At the same time, it uploads generator operating data to the power plant monitoring system through communication functions, realizing remote monitoring and management of the generator.
Power Generation Systems: In power stations such as thermal power, hydropower, and wind power, UR9EV can be used for the protection and control of generators. It real-time monitors parameters such as stator current, rotor current, terminal voltage, and frequency of the generator. When faults such as overload, short circuit, and loss of excitation occur, it quickly acts to remove the fault to protect the generator's safety. At the same time, it uploads generator operating data to the power plant monitoring system through communication functions, realizing remote monitoring and management of the generator.
Power Transmission and Distribution Systems: In power transmission and distribution equipment such as transmission lines, distribution transformers, and switchgear, UR9EV can provide functions such as overcurrent, overvoltage, and differential protection to ensure the safe and stable operation of the power transmission and distribution network. For example, in distribution transformer protection, it can monitor the current and voltage on the high and low voltage sides of the transformer. When faults such as short circuit, overload, and gas alarm occur, it promptly disconnects the switches on both sides of the transformer to prevent transformer damage and ensure reliable power supply of the distribution system.
Industrial Power Equipment: In equipment such as transformer substations, large motors, and high-voltage water pumps in industrial enterprises, UR9EV can serve as a core protection device to provide comprehensive protection for the equipment. For large motors, it can monitor parameters such as operating current and temperature, realize protection functions such as overload, locked rotor, phase loss, and grounding, and avoid motor damage due to faults affecting production. At the same time, through communication with the industrial automation system, it is integrated into the enterprise's overall control system, improving the automated operation level of industrial power equipment.
Rail Transit Power Systems: In traction power supply systems and power lighting systems of rail transit such as subways and light rails, UR9EV can be used to protect equipment such as rectifiers, traction transformers, and distribution lines. Due to the high reliability requirements of rail transit power systems, its fast fault response capability and stable operating performance can effectively ensure the normal power supply of rail transit and avoid serious consequences such as train shutdown caused by power faults.
